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SupportsJPGPNGWebPGIFBMPSVG
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Files never uploaded
100% browser-side processing
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No file size limits
Process any file size
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Instant conversion
No server wait time
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100% Free forever
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No watermarks
Clean output guaranteed

Free Online Image Resizer

Resize images to exact pixel dimensions or by percentage — maintaining original aspect ratio or using custom dimensions. Perfect for resizing photos for social media posts, email attachments, website uploads, profile pictures, and print-ready assets.

Free Online Image Resizer — Format Comparison

PlatformRecommended SizeAspect RatioFormat
Instagram Post1080 × 1080 px1:1JPG / PNG
Instagram Story1080 × 1920 px9:16JPG / PNG
Twitter / X Header1500 × 500 px3:1JPG / PNG
Facebook Cover820 × 312 px2.63:1JPG / PNG
LinkedIn Banner1584 × 396 px4:1JPG / PNG
YouTube Thumbnail1280 × 720 px16:9JPG
Favicon32 × 32 px1:1PNG / ICO
Open Graph Image1200 × 630 px1.91:1JPG

🔧 Related Tools

✂️ Crop Image🔄 Image Converter (WebP)🖼️ Multi-Image Converter🖼️ HEIC Converter▶️ YouTube Thumbnail

❓ Frequently Asked Questions

Reducing image dimensions (downscaling) maintains visual quality well. Increasing dimensions beyond the original (upscaling) causes blurring because pixel data must be interpolated.

Enable "Lock Aspect Ratio" — this ensures width and height scale proportionally so the image is never distorted.

For web images, aim for 72–96 DPI and maximum 1920px width. Use WebP format for 30% smaller files. For hero images, 1200–1920px wide at 85% quality JPG is standard.

Yes! Our resizer preserves transparency in PNG files. The output PNG will retain all transparent areas at the new size.

DPI (dots per inch) matters only for print. For web/screen use, pixel dimensions are what count — 72 DPI at 1920×1080 looks identical to 300 DPI at 1920×1080 on a monitor.

Use our Multi-Image Converter for batch resizing. Process multiple images to identical dimensions simultaneously.

No fixed limit — dependent on your browser's available RAM. Most devices handle images up to 30–50 megapixels without issues.

Mathematically yes, but artificial enlargement cannot recover detail that was never in the original image. Use AI upscaling tools for better results when significantly enlarging images.